The new tab button is now surrounded by a large gray box after downloading the new version

Question

Rather than seeing just the small rounded light gray button around the "+" sign for a new tab, there is now a larger, dark grey rectangle (larger than the new button itself) over the "+" sign. When I hover, the rounded part of the button appears, but the larger gray box remains.
It's almost like I'd like to write a short {display: none !important}, but I'm new to Firebug, and can't figure out how to get the name of that part of the screen.
I have a screen shot which I'd like to add to this post, but having difficulty adding it in.
Thanks for your help.

Answer 1

Hello,
You can add screenshots to replies only. Try disabling graphics hardware acceleration first to see if that gets rid of it. You might need to restart Firefox in order for this to take effect, so save all work first (e.g., mail you are composing, online documents you're editing, etc.).
Then perform these steps:
# Click the menu button [[Image:New Fx Menu]] and select ''Options'' for Windows or ''Preferences'' on Mac or Linux.
#In the Firefox Options (or Preferences) window, click the ''Advanced'' tab, then select ''General''.
#In the settings list, you should find the ''Use hardware acceleration when available'' checkbox. Uncheck this checkbox.
#Now, restart Firefox and see if the problems persist.
Additionally, please check for updates for your graphics driver by following the steps mentioned in the following Knowledge base articles:
* [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]]
* [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]
You can also see if the gray box appears in [[Troubleshoot Firefox issues using Safe Mode|Firefox Safe Mode]] - it could be caused by an extension.
If those don't help, then please attach a screenshot by clicking the '''Browse...''' button below the ''Post your reply'' box. This will help us to visualize the problem.